> The jury is still out on that one. :-) > > I would say that using EntityLockMonitor helps give you an impression of > whether things are locking the way you think they are. > > If you see bigger numbers in the monitor than you would expect, then > this gives you an indication that things are going awry. > > Generally I don't think locking should cause problems unless you have > many concurrent writes to the same set of data. > > I noticed one interesting thing in the code for JBoss 3.0.4 though. > Basically for read-only methods, the lock manager still locks the > object, but only for the duration of the invocation.
the strategy is QueuedPessismisticEJBLock, there is a ReadWriteLock strategy that you can try by changing the lokcing policy in the config of your bean. > > Even this approach is a little overzealous, because an object doesn't > need to be locked for concurrent reads, only if a write operation is > taking place. > > This can be achieved using two types of lock; read locks and write > locks. It looks like in later versions of JBoss, a better read/write > lock strategy is used. > > Is this correct? > > On Wed, 2003-12-10 at 19:05, Bill Burke wrote: >> Cool. So you actually found the EntityLockMonitor useful? >> >> Bill >> >> Pete Beck wrote: >> >>> Hi everyone. >>> >>> For the benefit of mankind, I've just written an article on our >>> experiences with JBoss and tackling deadlocks: >>> >>> http://i3t.org/members/article.jsp?articleId=1595209 >>> >>> It seems to be a frequent issue for people so I thought it might be >>> useful for the archives and it might save future deadlockees some time. >>> >>> Kind regards, >>> Pete Beck >>> ------------------------------------------------------- This SF.net email is sponsored by: IBM Linux Tutorials. Become an expert in LINUX or just sharpen your skills. Sign up for IBM's Free Linux Tutorials. Learn everything from the bash shell to sys admin. Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click _______________________________________________ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
